So we try to understand the Vedic literatures from our superior spiritual master. That is the process. Just like Arjuna is trying to understand from Bhagavad-gītā, or from Kṛṣṇa, similarly, if we want to understand Bhagavad-gītā, then we have to understand it from Arjuna, not from any other person.
If you have got any knowledge of Bhagavad-gītā, you have to see how does it tally with the understanding of Arjuna? That you'll find in the tenth chapter. If you find that, that you have understood in the same way as Arjuna understood it, Bhagavad-gītā, then your understanding of Bhagavad-gītā is right. Otherwise, if you have understood in a different way which is not corroborated by the understanding of Arjuna, then your understanding of Bhagavad-gītā is different from the Bhagavad-gītā as it is. This should be the criterion of your study. So if we actually want to derive some benefit out of the Bhagavad-gītā, then we have to follow these principles.